... timing pulley:1. Plain bore: MXL, XL, L, H; T2.5, T5, T10; AT5, AT10; HTD 3M, 5M, 8M, 14M.2. Taper ... from 9 to 216.Specifications1.high quality and most competitive in European market 2.Material:Plastic 3.Belt pulley, non-standard or standard ... qualityCertification:We've been ISO9001:2000 certified since 2003. HTD Taper bush pulleys